There's still plenty of time so you don't need to start panicking yet. I'd suggest you ask around, maybe with people on your course or people in societies/AUs you might be in. Chances are there will be plenty of people in the same situation as you and by asking around first you could end up living with people you know. If you have no luck when you talk to people then maybe go to talk the uni/HUU homes, I know people who were in the same situation as you last year and the uni basically just puts you in a house with other people like you. You'll end up living with random people you don't know like first year, but you'll have somewhere to live.